Traction control light turning on after tie rod replacement

I replaced my inner and outer tie rods yesterday, and took it to a shop 2 miles down the road to get it aligned. The install went well, and no codes or anything threw up on the drive to the shop.

My alignment was sorely needed, and I was driving away about 0.5 mile before the T/C light comes up and keeps beeping. It stays on until I turn into a parking lot off the road. Now it comes on every 5-10 minutes of driving, totally randomly.

A quick google search tells me I may have hit a wheel speed sensor when changing out some parts. Anyone know where this is on an 05 Prius? I have no reason to believe I'm actually losing traction, and the alignment guys are generally pretty good at this shop.